Lenovo IdeaPad S400u
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This article covers the Arch Linux support for the Lenovo Ideapad S400u ultrabook.
Configuration
Jumping cursor on touchpad release
It might be solved with synclient FingerHigh and FingerLow:
synclient FingerHigh=40 synclient FingerLow=40
Video
Drivers: xf86-video-intel and libva-intel-driver.
Brightness Control
Works okay with the corresponding Fn keys.